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<a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a>   <em class="jxr_comment"> * SimpleSessionHistoryManager.java</em>
<a name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a name="4" href="#4">4</a>   <em class="jxr_comment"> * Created on June 27, 2007, 12:38 PM</em>
<a name="5" href="#5">5</a>   <em class="jxr_comment"> *</em>
<a name="6" href="#6">6</a>   <em class="jxr_comment"> * To change this template, choose Tools | Template Manager</em>
<a name="7" href="#7">7</a>   <em class="jxr_comment"> * and open the template in the editor.</em>
<a name="8" href="#8">8</a>   <em class="jxr_comment"> */</em>
<a name="9" href="#9">9</a>   <strong class="jxr_keyword">package</strong> com.totsp.gwittir.client.flow;
<a name="10" href="#10">10</a>  
<a name="11" href="#11">11</a>  <strong class="jxr_keyword">import</strong> java.util.ArrayList;
<a name="12" href="#12">12</a>  
<a name="13" href="#13">13</a>  <strong class="jxr_keyword">import</strong> com.google.gwt.core.client.GWT;
<a name="14" href="#14">14</a>  <strong class="jxr_keyword">import</strong> com.google.gwt.user.client.ui.Widget;
<a name="15" href="#15">15</a>  <strong class="jxr_keyword">import</strong> com.totsp.gwittir.client.log.Level;
<a name="16" href="#16">16</a>  <strong class="jxr_keyword">import</strong> com.totsp.gwittir.client.log.Logger;
<a name="17" href="#17">17</a>  <strong class="jxr_keyword">import</strong> com.totsp.gwittir.client.ui.BoundWidget;
<a name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> com.totsp.gwittir.client.util.HistoryTokenizer;
<a name="19" href="#19">19</a>  
<a name="20" href="#20">20</a>  <em class="jxr_javadoccomment">/**</em>
<a name="21" href="#21">21</a>  <em class="jxr_javadoccomment"> * A simple history manager that creates an inline List for each state change</em>
<a name="22" href="#22">22</a>  <em class="jxr_javadoccomment"> * in the flow controller.</em>
<a name="23" href="#23">23</a>  <em class="jxr_javadoccomment"> * </em>
<a name="24" href="#24">24</a>  <em class="jxr_javadoccomment"> * This class will provide basic back-forward support without deep linking.</em>
<a name="25" href="#25">25</a>  <em class="jxr_javadoccomment"> * </em>
<a name="26" href="#26">26</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="mailto:cooper@screaming-penguin.com" target="alexandria_uri">mailto:cooper@screaming-penguin.com</a>"&gt;Robert "kebernet"</em>
<a name="27" href="#27">27</a>  <em class="jxr_javadoccomment"> *         Cooper&lt;/a&gt;</em>
<a name="28" href="#28">28</a>  <em class="jxr_javadoccomment"> */</em>
<a name="29" href="#29">29</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">SimpleSessionHistoryManager</a> implements <a href="../../../../../com/totsp/gwittir/client/flow/HistoryManager.html">HistoryManager</a> {
<a name="30" href="#30">30</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../com/totsp/gwittir/client/log/Logger.html">Logger</a> LOGGER = Logger.getLogger(SimpleSessionHistoryManager.<strong class="jxr_keyword">class</strong>.toString());
<a name="31" href="#31">31</a>  	<strong class="jxr_keyword">private</strong> ArrayList&lt;FlowEvent&gt; states = <strong class="jxr_keyword">new</strong> ArrayList&lt;FlowEvent&gt;();
<a name="32" href="#32">32</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> ignoreNext = false;
<a name="33" href="#33">33</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> currentState = -1;
<a name="34" href="#34">34</a>  	
<a name="35" href="#35">35</a>  	<em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Creates a new instance of <a href="../../../../../com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">SimpleSessionHistoryManager</a> */</em>
<a name="36" href="#36">36</a>  	<strong class="jxr_keyword">public</strong> <a href="../../../../../com/totsp/gwittir/client/flow/SimpleSessionHistoryManager.html">SimpleSessionHistoryManager</a>() {
<a name="37" href="#37">37</a>  	}
<a name="38" href="#38">38</a>  
<a name="39" href="#39">39</a>  	<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> apply(String historyToken) {
<a name="40" href="#40">40</a>  		LOGGER.log(Level.DEBUG, <span class="jxr_string">"Apply "</span>+historyToken, <strong class="jxr_keyword">null</strong>);
<a name="41" href="#41">41</a>  		HistoryTokenizer tok = <strong class="jxr_keyword">new</strong> <a href="../../../../../com/totsp/gwittir/client/util/HistoryTokenizer.html">HistoryTokenizer</a>(historyToken);
<a name="42" href="#42">42</a>  
<a name="43" href="#43">43</a>  		<strong class="jxr_keyword">if</strong> ((tok.getToken(<span class="jxr_string">"s"</span>) == <strong class="jxr_keyword">null</strong>)
<a name="44" href="#44">44</a>  				|| (Integer.parseInt(tok.getToken(<span class="jxr_string">"s"</span>).toString()) == currentState)) {
<a name="45" href="#45">45</a>  			<strong class="jxr_keyword">return</strong>;
<a name="46" href="#46">46</a>  		}
<a name="47" href="#47">47</a>  
<a name="48" href="#48">48</a>  		<strong class="jxr_keyword">int</strong> targetState = Integer.parseInt(tok.getToken(<span class="jxr_string">"s"</span>).toString());
<a name="49" href="#49">49</a>  		LOGGER.log(
<a name="50" href="#50">50</a>  				Level.SPAM,
<a name="51" href="#51">51</a>  				<span class="jxr_string">"Repositioning to state: "</span> + targetState + <span class="jxr_string">" of "</span>
<a name="52" href="#52">52</a>  						+ states.size() + <span class="jxr_string">"from "</span> + currentState, <strong class="jxr_keyword">null</strong>);
<a name="53" href="#53">53</a>  		<strong class="jxr_keyword">if</strong>(targetState &gt;= states.size() ){
<a name="54" href="#54">54</a>  			tok.setToken(<span class="jxr_string">"s"</span>, <span class="jxr_string">""</span>+(states.size() -1));
<a name="55" href="#55">55</a>  			<strong class="jxr_keyword">return</strong>;
<a name="56" href="#56">56</a>  		}
<a name="57" href="#57">57</a>  		callState(targetState);
<a name="58" href="#58">58</a>  		currentState = targetState;
<a name="59" href="#59">59</a>  	}
<a name="60" href="#60">60</a>  	
<a name="61" href="#61">61</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> callState(<strong class="jxr_keyword">int</strong> index) {
<a name="62" href="#62">62</a>  		ignoreNext = <strong class="jxr_keyword">true</strong>;
<a name="63" href="#63">63</a>  		<strong class="jxr_keyword">if</strong>(currentState &gt; index ){
<a name="64" href="#64">64</a>  			<strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i = currentState; i &gt; index;	i--){
<a name="65" href="#65">65</a>  				FlowEvent state = states.get(i);
<a name="66" href="#66">66</a>  				LOGGER.log(Level.DEBUG, <span class="jxr_string">"calling "</span>+state.getFromName(), <strong class="jxr_keyword">null</strong>);
<a name="67" href="#67">67</a>  				FlowController.call( state.getManagedWidget(), 
<a name="68" href="#68">68</a>  						state.getFromName(), 
<a name="69" href="#69">69</a>  						state.getFromModel() );
<a name="70" href="#70">70</a>  			}
<a name="71" href="#71">71</a>  		} <strong class="jxr_keyword">else</strong> {
<a name="72" href="#72">72</a>  			<strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i = currentState+1; i &lt;= index; i++ ){
<a name="73" href="#73">73</a>  				FlowEvent state = states.get(i);
<a name="74" href="#74">74</a>  				FlowController.call( state.getManagedWidget(), 
<a name="75" href="#75">75</a>  						state.getToName(), 
<a name="76" href="#76">76</a>  						state.getToModel() );
<a name="77" href="#77">77</a>  			}
<a name="78" href="#78">78</a>  		}
<a name="79" href="#79">79</a>  		ignoreNext = false;
<a name="80" href="#80">80</a>  			
<a name="81" href="#81">81</a>  	}
<a name="82" href="#82">82</a>  
<a name="83" href="#83">83</a>  	<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> transition(<a href="../../../../../com/totsp/gwittir/client/flow/FlowEvent.html">FlowEvent</a> event, <strong class="jxr_keyword">boolean</strong> appendHistory) {
<a name="84" href="#84">84</a>  		<strong class="jxr_keyword">if</strong>(ignoreNext)
<a name="85" href="#85">85</a>  			<strong class="jxr_keyword">return</strong>;
<a name="86" href="#86">86</a>  		currentState++;
<a name="87" href="#87">87</a>  		<strong class="jxr_keyword">if</strong>( currentState == states.size() ){
<a name="88" href="#88">88</a>  			states.add(event);
<a name="89" href="#89">89</a>  		} <strong class="jxr_keyword">else</strong> {
<a name="90" href="#90">90</a>  			states.set(currentState, event);
<a name="91" href="#91">91</a>  		}
<a name="92" href="#92">92</a>  		<strong class="jxr_keyword">if</strong>(appendHistory){
<a name="93" href="#93">93</a>  			HistoryTokenizer tok = <strong class="jxr_keyword">new</strong> <a href="../../../../../com/totsp/gwittir/client/util/HistoryTokenizer.html">HistoryTokenizer</a>();
<a name="94" href="#94">94</a>  			tok.begin();
<a name="95" href="#95">95</a>  			tok.setToken(<span class="jxr_string">"s"</span>, Integer.toString(currentState));
<a name="96" href="#96">96</a>  			tok.commit();
<a name="97" href="#97">97</a>  		}
<a name="98" href="#98">98</a>  	}
<a name="99" href="#99">99</a>  
<a name="100" href="#100">100</a> 
<a name="101" href="#101">101</a> 
<a name="102" href="#102">102</a> }
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